Files
30-seconds-of-code/test/join/join.js
Angelos Chalaris 4f7da1be9b Test migration to jest by hand
Apparently using regular expressions is way easier.
2018-06-18 15:15:56 +03:00

11 lines
212 B
JavaScript

const join = (arr, separator = ',', end = separator) =>
arr.reduce(
(acc, val, i) =>
i === arr.length - 2
? acc + val + end
: i === arr.length - 1
? acc + val
: acc + val + separator,
''
);
module.exports = join;